Oro Mining Provides Sonic Drilling Update

VANCOUVER, BRITISH COLUMBIA -- (Marketwire) -- 03/04/11 -- Oro Mining Ltd. (TSX VENTURE: OGR) provides an update on the currently planned 5,000 metre sonic drill program being conducted on its Trinidad property located in Sinaloa, Mexico. Sonic drilling commenced mid-February at the Taunus gold deposit. Three sonic drill holes have been completed to date.

The Company is moving the sonic drill rig inside the completely dewatered pit to commence drilling in the southern area near hole 41 which returned 11.9 g/t gold over 41 metres (press release dated March 3, 2010). Twelve sonic drill holes are planned as part of an initial phase to cover approximately a 500-metre length across the main part of the Taunus resource.

The sonic drill program is aimed at upgrading and increasing the Taunus gold resource and has the following objectives:

--  Increase the gold grade of the Eldorado zone
--  Discover additional gold zones in-between the Eldorado and HS zones
--  Continue to define the dimensions and gold grade of the HS zone
--  Target offsets and extensions to the modeled gold zones
--  Target potential high-grade gold feeders

Oro Mining expects to start releasing assay results on the sonic drilling in early April.

An updated plan map, photos of the Taunus pit, and longitudinal/cross-sections showing the location of proposed sonic drill holes are appended at the bottom of this release. The sections also graphically reference the recently completed resource block model and defined pit limits.

Oro Mining also announces that it will be exhibiting at the Prospectors & Developers Association of Canada ('PDAC') Convention 2011 being held at the Metro Toronto Convention Centre, South Building, from Sunday, March 6 to Wednesday, March 9, 2011.

Oro Mining encourages its shareholders and all interested parties to come by booth #2849 to learn more about the Company's projects in Mexico. In addition, the Company informs that its new updated corporate presentation is now available on its website at www.oromining.com. The updated presentation includes valuable information regarding the Company's main projects in Sinaloa and Zacatecas, Mexico.

Quality Control

Oro Mining maintains a strict quality control program. All samples generated by Oro Mining were submitted directly to Inspectorate, an ISO 9001-2008 certified assay laboratory, for preparation in Durango, Mexico, and analysis in Reno, Nevada. All sonic drill samples submitted for analysis were from splits of half-sawn frozen core. Analysis was conducted on 1 assay ton samples for gold, with a standard, blank and duplicate inserted for every 20 samples submitted. Analysis of gold was by fire assay with AAS finish, and with gravimetric finish on samples exceeding 5 g/t gold. (Gary) Y.Y. Wong, P.Eng.is a qualified person as defined by National Instrument 43-101 and has reviewed the content of this press release.

About Oro Mining

Oro Mining is a publicly-listed company on the TSX Venture Exchange with properties located in Sinaloa and Zacatecas, Mexico. Oro Mining's corporate mandate is to advance its projects toward production, while continuing to make exploration discoveries on its extensive property position. The district-scale Trinidad property that hosts the Taunus gold deposit continues to be the focus of Oro Mining's exploration and project development activities. The Company's mission is to create exceptional value for our shareholders through exploration discovery, resource growth, mine development and production, while providing sustainable benefits to our staff, the environment, and the communities where we operate.

ON BEHALF OF THE BOARD OF DIRECTORS

John Brownlie, CEO and COO

Some statements in this release may contain forward-looking information. These statements include, but are not limited to, statements with respect to future drilling, exploration, development and production activities. These statements address future events and conditions and, as such, involve known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by the statements.

To view the photos, map and sections associated with this release, please click here: http://media3.marketwire.com/docs/ogr304images.pdf.

Neither the TSX Venture Exchange nor its Regulation Services Provider (as the term is defined in the policies of the TSX Venture Exchange) accept responsibility for the adequacy or accuracy of this release.

Contacts:

Oro Mining Ltd.

Darren Bahrey

604 646-1580

604 642-2411 (FAX)
www.oromining.com